沙漠增温效应下绿洲气象要素时空效应特征分析

本文对古尔班通古特沙漠及其南部不同距离绿洲的温度、气压、风向风速及净辐射进行了比较分析。结果表明,沙漠地表面温度和气温升降速度比绿洲观测点要快、变化幅度大;由于各观测点空气相对湿度和温度升降度不同,使得各观测点的气压升降幅度也不同,白天气压的变化曲线呈单蜂型;各观测点在12:00到18:00期间主导风向主要是南风,还有东南或西南风,在20:00时风速几乎为0;早上和晚上沙漠的净辐射高于绿洲,白天近地面净辐射绿洲大于沙漠;对绿洲气象要素时空效应特征分析,为棉花等绿洲优势作物的播种期、物候期、作物生育及生理生态特性具有一定的指导意义。

Analysis on the Space-time Effect on Oasis Weather Factors under the Desert Incalescence Effect

This research is about the analysis on temperature of Gurbantunggut Desert and its south by distance、airpressure、the direction and velocity of wind and clean radiations.The results indicated that the earth's surface tem-perature and air temperature of the desert comparing the oasis of the variety range are higher and ascend and de-scend of the speed are quicker;As the ascend and descend changes of air relative humidity and temperature aredifferent at each observation spot,the variety curve of the air pressure of daytime shows the single type of wave;At each observation spot the predominant direction of wind was mainly souther,still having the southeast orsouthwester at12:00-18:00;Wind speed almost is0 at20:00;The clean radiation at the morning and the eve-ning of desert are higher than in oasis,the clean radiation in oasis in the daytime is bigger than in desert.